Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota 4Runner 1996-2003 Approved SIL techinfo.toyota.com ileaf 02toyrm 02toypdf 02rmsour 2002 024runne in httecsy htpwt

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IN-18                                        INTRODUCTION         -    HOW TO TROUBLESHOOT ECU CONTROLLED
                                                                       SYSTEMS
                                                                                                                     IN05W-33


HOW TO PROCEED WITH TROUBLESHOOTING
Carry out troubleshooting in accordance with the procedure on the following page. Here, only the basic pro-
cedure is shown. Details are provided in Diagnostics section, showing the most effective methods for each
circuit. Confirm the troubleshooting procedures first for the relevant circuit before beginning troubleshooting
of that circuit.

        Vehicle Brought to Workshop


                                                                      1
  1       Customer Problem                                            Ask the customer about the conditions and the
          Analysis                                                    environment when the problem occurred.




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   2     Symptom Confirmation                        3



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         and Diagnostic Trouble

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                                                    Symptom Simulation
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         Code Check                                                       w

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